Later today, you should be able to purchase The Hidden Paths: Shamans, a long-out-of-print White Wolf era Ars Magica supplement, from RPGNow.

This is one of many PDFs I need to get prepped and uploaded for digital sales. I hope I'll get more done soon, but I've been overloaded with other things (such as logistics from China -- boy have ocean freight containers gotten expensive with the fuel prices today).